oriented corridor in the leaf sheath (very rarely in the blade).
Often several mines together, sometimes confluent. Frass in dispersed
little granules. Pupation within the mine (Bladmineerders van Europa).
Larva: The larvae of flies are leg-less maggots without a head capsule (see examples). They never have thoracic or abdominal legs. They do not have chewing mouthparts, although they do have a characteristic cephalo-pharyngeal skeleton (see examples), usually visible internally through the body wall.
Mandible with two teeth (de Meijere, 1937a, Nowakowski, 1973a) (Bladmineerders van Europa).
The puparia of flies are formed within the hardened last larval skin or puparium and as a result sheaths enclosing head appendages, wings and legs are not visible externally (see examples).
Relatively slender; front spiraculum weakly bifid with about
10 bulbs; rear spiraculum fist-shaped with ca. 15, irregularly
arranged large bulbs (Venturi, 1946a) (Bladmineerders van Europa).
Hosts in Great Britain & Ireland:
of year - larvae:
Larvae in June-July and September-October (Nowakowski, 1973a) (Bladmineerders van Europa).
of year - adults: Currently unknown.
in Great Britain & Ireland: Added to the British list by
Gibbs, 2006. (NBN Atlas).
elsewhere: Widespread in continental Europe including Belgium, Corsica, Czech Republic, French mainland,
Hungary, Italian mainland, Poland, Spanish mainland, Yugoslavia
(Martinez in Fauna Europaea).
NBN Atlas links to known host species:
British and Irish Parasitoids in Britain and elsewhere: Currently unknown.